Under Add New Subscriber, enter the new member's email address (Firstname.Lastname@stonybrook.edu) and then their first and last name (i.e. Fred.Flintstone@stonybrook.edu Fred Flintstone)

You will have the option to either notify the user that they have been added, or not

Click Add to <listname>

To add more than one subscriber at a time:

In order to add multiple people to your list at once, you must create a plain text file (.txt) containing the email address and names of each subscriber (each subscriber should be on a different line) so you can import the subscribers